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In bryophytes and pteridophytes, transport of male gametes requires?
Mannitol is the stored food in:
A galvanometer of resistance 50 Ω is connected to a battery of 3 V along with a resistance of 2950 Ω in series. A full-scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be:
Which of the following algae contains mannitol as reserve food material?
Male gametes are flagellated in:
An alga which can be employed as food for human beings:
Besides paddy fields, cyanobacteria are also found inside vegetative part of:
Read the following statements (A-E) and answer the question which follows them. A: In liverworts, mosses, and ferns gametophytes are free-living B: Gymnosperms and some ferns are heterosporous C: Sexual reproduction in Fucus, Volvox and Albugo is oogamous D: The sporophyte in liverworts is more elaborate than that in mosses E: Both, Pinus and Marchantia are dioecious How many of the above statements are correct?
Which one of the following generally acts as an antagonist to Gibberellins?
When a 12 \Omega resistor is connected in parallel with a moving coil galvanometer, its deflection reduces from 50 divisions to 10 divisions. What will be the resistance of the galvanometer?
Each of the two strings of length $51.6 \text{ cm}$ and $49.1 \text{ cm}$ are tensioned separately by $20 \text{ N}$ force. Mass per unit length of both the strings is same and equal to $1 \text{ g m}^{-1}$. When both the strings vibrate simultaneously the number of beats is:
Which of the following pairs is of unicellular algae?
Floridian starch has structure similar to :
Strobili or cones are found in:
Phycoerythrin is the major pigment in:
Which of the following statements is incorrect about gymnosperms?
A galvanometer of resistance G is shunted by a resistance S ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is
A true statement for Ulothrix:
The gametophyte is not an independent, free-living generation in:
A body is rolling without slipping on a horizontal surface and its rotational kinetic energy is equal to the translational kinetic energy. The body is: